Ah, those cheapy ones - I think not, but it wouldn't surprise me if someone's put some useful stuff up about them on a website somewhere - the simplest strategy is to try and read the chip markings from the enlarged photos (like the flame detector one has a 393 comparator and a trimpot and thus is likely a single digital output). Many of them are very simple so I think you will be able to get many to work without too much headscratching - and the forum hive-mind can help given part numbers etc.

The issue with finding the data sheet is due to the fact that the name on the controlers board .....................................KEYESis the name of the board manufacturer who does not specifiy his board anywhere however the controllers manufacture is.............ALPHA........................& .......................Their reference for the product is: 318-ENC130175F-12PSThe data sheet is just one page but it does describe the PIN_OUTS.